



'''simple docstring'''



import json
import os
from functools import lru_cache
from typing import List, Optional, Tuple

import regex as re

from ...tokenization_utils import AddedToken, PreTrainedTokenizer
from ...utils import logging


lowerCAmelCase_  :							Tuple             =    logging.get_logger(__name__)


lowerCAmelCase_  :							str             =    {'vocab_file': 'vocab.json', 'merges_file': 'merges.txt'}

# See all BART models at https://huggingface.co/models?filter=bart
lowerCAmelCase_  :							int             =    {
    'vocab_file': {
        'facebook/bart-base': 'https://huggingface.co/facebook/bart-base/resolve/main/vocab.json',
        'facebook/bart-large': 'https://huggingface.co/facebook/bart-large/resolve/main/vocab.json',
        'facebook/bart-large-mnli': 'https://huggingface.co/facebook/bart-large-mnli/resolve/main/vocab.json',
        'facebook/bart-large-cnn': 'https://huggingface.co/facebook/bart-large-cnn/resolve/main/vocab.json',
        'facebook/bart-large-xsum': 'https://huggingface.co/facebook/bart-large-xsum/resolve/main/vocab.json',
        'yjernite/bart_eli5': 'https://huggingface.co/yjernite/bart_eli5/resolve/main/vocab.json',
    },
    'merges_file': {
        'facebook/bart-base': 'https://huggingface.co/facebook/bart-base/resolve/main/merges.txt',
        'facebook/bart-large': 'https://huggingface.co/facebook/bart-large/resolve/main/merges.txt',
        'facebook/bart-large-mnli': 'https://huggingface.co/facebook/bart-large-mnli/resolve/main/merges.txt',
        'facebook/bart-large-cnn': 'https://huggingface.co/facebook/bart-large-cnn/resolve/main/merges.txt',
        'facebook/bart-large-xsum': 'https://huggingface.co/facebook/bart-large-xsum/resolve/main/merges.txt',
        'yjernite/bart_eli5': 'https://huggingface.co/yjernite/bart_eli5/resolve/main/merges.txt',
    },
}

lowerCAmelCase_  :							Union[str, Any]             =    {
    'facebook/bart-base': 1024,
    'facebook/bart-large': 1024,
    'facebook/bart-large-mnli': 1024,
    'facebook/bart-large-cnn': 1024,
    'facebook/bart-large-xsum': 1024,
    'yjernite/bart_eli5': 1024,
}
@lru_cache()
def        UpperCAmelCase (    ):
							SCREAMING_SNAKE_CASE       :   int         =      (
							    list(range(ord('''!'''					)       ,		ord('''~'''					) + 1					)					) + list(range(ord('''¡'''					)       ,		ord('''¬'''					) + 1					)					) + list(range(ord('''®'''					)       ,		ord('''ÿ'''					) + 1					)					)
							)
							SCREAMING_SNAKE_CASE       :   Optional[int]         =      bs[:]
							SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      0
							for b in range(2**8					):
														if b not in bs:
																					bs.append(A					)
																					cs.append(2**8 + n					)
																					n += 1
							SCREAMING_SNAKE_CASE       :   List[Any]         =      [chr(A					) for n in cs]
							return dict(zip(A       ,		A					)					)
def        UpperCAmelCase (    A	:					List[str]					):
							SCREAMING_SNAKE_CASE       :   int         =      set()
							SCREAMING_SNAKE_CASE       :   List[Any]         =      word[0]
							for char in word[1:]:
														pairs.add((prev_char, char)					)
														SCREAMING_SNAKE_CASE       :   List[Any]         =      char
							return pairs






class 						lowerCamelCase_				(       snake_case_      ):
						_lowerCAmelCase  : Tuple						  =					VOCAB_FILES_NAMES
						_lowerCAmelCase  : Tuple						  =					PRETRAINED_VOCAB_FILES_MAP
						_lowerCAmelCase  : List[str]						  =					PRETRAINED_POSITIONAL_EMBEDDINGS_SIZES
						_lowerCAmelCase  : Tuple						  =					['input_ids', 'attention_mask']







						def __init__(	self :   Union[str, Any]					,     lowerCAmelCase__ :   Dict					,     lowerCAmelCase__ :   Union[str, Any]					,     lowerCAmelCase__ :   Dict="replace"					,     lowerCAmelCase__ :   Optional[int]="<s>"					,     lowerCAmelCase__ :   Dict="</s>"					,     lowerCAmelCase__ :   List[Any]="</s>"					,     lowerCAmelCase__ :   str="<s>"					,     lowerCAmelCase__ :   List[Any]="<unk>"					,     lowerCAmelCase__ :   str="<pad>"					,     lowerCAmelCase__ :   Optional[Any]="<mask>"					,     lowerCAmelCase__ :   Any=False					,     **lowerCAmelCase__ :   Optional[int]					,     ):

													"""simple docstring"""
													SCREAMING_SNAKE_CASE       :   Optional[int]         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else bos_token
													SCREAMING_SNAKE_CASE       :   Tuple         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else eos_token
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else sep_token
													SCREAMING_SNAKE_CASE       :   str         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else cls_token
													SCREAMING_SNAKE_CASE       :   Optional[int]         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else unk_token
													SCREAMING_SNAKE_CASE       :   Optional[Any]         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else pad_token

													# Mask token behave like a normal word, i.e. include the space before it
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      AddedToken(lowerCAmelCase__					,     lstrip=lowerCAmelCase__					,     rstrip=lowerCAmelCase__					) if isinstance(lowerCAmelCase__					,     lowerCAmelCase__					) else mask_token

													super().__init__(
													    errors=lowerCAmelCase__					,     bos_token=lowerCAmelCase__					,     eos_token=lowerCAmelCase__					,     unk_token=lowerCAmelCase__					,     sep_token=lowerCAmelCase__					,     cls_token=lowerCAmelCase__					,     pad_token=lowerCAmelCase__					,     mask_token=lowerCAmelCase__					,     add_prefix_space=lowerCAmelCase__					,     **lowerCAmelCase__					,     )

													with open(lowerCAmelCase__					,     encoding='''utf-8'''					) as vocab_handle:
																				SCREAMING_SNAKE_CASE       :   Tuple         =      json.load(lowerCAmelCase__					)
													SCREAMING_SNAKE_CASE       :   int         =      {v: k for k, v in self.encoder.items()}
													SCREAMING_SNAKE_CASE       :   Any         =      errors  # how to handle errors in decoding
													SCREAMING_SNAKE_CASE       :   Optional[Any]         =      bytes_to_unicode()
													SCREAMING_SNAKE_CASE       :   Optional[Any]         =      {v: k for k, v in self.byte_encoder.items()}
													with open(lowerCAmelCase__					,     encoding='''utf-8'''					) as merges_handle:
																				SCREAMING_SNAKE_CASE       :   List[str]         =      merges_handle.read().split('''\n'''					)[1:-1]
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      [tuple(merge.split()					) for merge in bpe_merges]
													SCREAMING_SNAKE_CASE       :   Any         =      dict(zip(lowerCAmelCase__					,     range(len(lowerCAmelCase__					)					)					)					)
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      {}
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      add_prefix_space

													# Should have added re.IGNORECASE so BPE merges can happen for capitalized versions of contractions
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      re.compile(R'''\'s|\'t|\'re|\'ve|\'m|\'ll|\'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+'''					)







						@property
						def        __lowercase     (	self :   Union[str, Any]					):

													"""simple docstring"""
													return len(self.encoder					)







						def        __lowercase     (	self :   Any					):

													"""simple docstring"""
													return dict(self.encoder					,     **self.added_tokens_encoder					)







						def        __lowercase     (	self :   int					,     lowerCAmelCase__ :   List[str]					):

													"""simple docstring"""
													if token in self.cache:
																				return self.cache[token]
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      tuple(lowerCAmelCase__					)
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      get_pairs(lowerCAmelCase__					)

													if not pairs:
																				return token

													while True:
																				SCREAMING_SNAKE_CASE       :   int         =      min(lowerCAmelCase__					,     key=lambda lowerCAmelCase__					: self.bpe_ranks.get(lowerCAmelCase__					,     float('''inf'''					)					)					)
																				if bigram not in self.bpe_ranks:
																											break
																				SCREAMING_SNAKE_CASE       ,SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      bigram
																				SCREAMING_SNAKE_CASE       :   str         =      []
																				SCREAMING_SNAKE_CASE       :   Tuple         =      0
																				while i < len(lowerCAmelCase__					):
																											try:
																																		SCREAMING_SNAKE_CASE       :   Tuple         =      word.index(lowerCAmelCase__					,     lowerCAmelCase__					)
																											except ValueError:
																																		new_word.extend(word[i:]					)
																																		break
																											else:
																																		new_word.extend(word[i:j]					)
																																		SCREAMING_SNAKE_CASE       :   Optional[int]         =      j

																											if word[i] == first and i < len(lowerCAmelCase__					) - 1 and word[i + 1] == second:
																																		new_word.append(first + second					)
																																		i += 2
																											else:
																																		new_word.append(word[i]					)
																																		i += 1
																				SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      tuple(lowerCAmelCase__					)
																				SCREAMING_SNAKE_CASE       :   str         =      new_word
																				if len(lowerCAmelCase__					) == 1:
																											break
																				else:
																											SCREAMING_SNAKE_CASE       :   List[Any]         =      get_pairs(lowerCAmelCase__					)
													SCREAMING_SNAKE_CASE       :   List[Any]         =      ''' '''.join(lowerCAmelCase__					)
													SCREAMING_SNAKE_CASE       :   List[Any]         =      word
													return word







						def        __lowercase     (	self :   str					,     lowerCAmelCase__ :   Union[str, Any]					):

													"""simple docstring"""
													SCREAMING_SNAKE_CASE       :   Dict         =      []
													for token in re.findall(self.pat					,     lowerCAmelCase__					):
																				SCREAMING_SNAKE_CASE       :   Optional[Any]         =      ''''''.join(
																				    self.byte_encoder[b] for b in token.encode('''utf-8'''					)					)  # Maps all our bytes to unicode strings, avoiding control tokens of the BPE (spaces in our case)
																				bpe_tokens.extend(bpe_token for bpe_token in self.bpe(lowerCAmelCase__					).split(''' '''					)					)
													return bpe_tokens







						def        __lowercase     (	self :   Dict					,     lowerCAmelCase__ :   Any					):

													"""simple docstring"""
													return self.encoder.get(lowerCAmelCase__					,     self.encoder.get(self.unk_token					)					)







						def        __lowercase     (	self :   int					,     lowerCAmelCase__ :   Dict					):

													"""simple docstring"""
													return self.decoder.get(lowerCAmelCase__					)







						def        __lowercase     (	self :   Union[str, Any]					,     lowerCAmelCase__ :   Dict					):

													"""simple docstring"""
													SCREAMING_SNAKE_CASE       :   str         =      ''''''.join(lowerCAmelCase__					)
													SCREAMING_SNAKE_CASE       :   str         =      bytearray([self.byte_decoder[c] for c in text]					).decode('''utf-8'''					,     errors=self.errors					)
													return text







						def        __lowercase     (	self :   Dict					,     lowerCAmelCase__ :   str					,     lowerCAmelCase__ :   Optional[str] = None					):

													"""simple docstring"""
													if not os.path.isdir(lowerCAmelCase__					):
																				logger.error(F"""Vocabulary path ({save_directory}) should be a directory"""					)
																				return
													SCREAMING_SNAKE_CASE       :   Tuple         =      os.path.join(
													    lowerCAmelCase__					,     (filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''vocab_file''']					)
													SCREAMING_SNAKE_CASE       :   Optional[int]         =      os.path.join(
													    lowerCAmelCase__					,     (filename_prefix + '''-''' if filename_prefix else '''''') + VOCAB_FILES_NAMES['''merges_file''']					)

													with open(lowerCAmelCase__					,     '''w'''					,     encoding='''utf-8'''					) as f:
																				f.write(json.dumps(self.encoder					,     indent=2					,     sort_keys=lowerCAmelCase__					,     ensure_ascii=lowerCAmelCase__					) + '''\n'''					)

													SCREAMING_SNAKE_CASE       :   Any         =      0
													with open(lowerCAmelCase__					,     '''w'''					,     encoding='''utf-8'''					) as writer:
																				writer.write('''#version: 0.2\n'''					)
																				for bpe_tokens, token_index in sorted(self.bpe_ranks.items()					,     key=lambda lowerCAmelCase__					: kv[1]					):
																											if index != token_index:
																																		logger.warning(
																																		    F"""Saving vocabulary to {merge_file}: BPE merge indices are not consecutive."""
																																		    ''' Please check that the tokenizer is not corrupted!'''					)
																																		SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      token_index
																											writer.write(''' '''.join(lowerCAmelCase__					) + '''\n'''					)
																											index += 1

													return vocab_file, merge_file







						def        __lowercase     (	self :   List[str]					,     lowerCAmelCase__ :   List[int]					,     lowerCAmelCase__ :   Optional[List[int]] = None					):

													"""simple docstring"""
													if token_ids_a is None:
																				return [self.cls_token_id] + token_ids_a + [self.sep_token_id]
													SCREAMING_SNAKE_CASE       :   Union[str, Any]         =      [self.cls_token_id]
													SCREAMING_SNAKE_CASE       :   List[str]         =      [self.sep_token_id]
													return cls + token_ids_a + sep + sep + token_ids_a + sep







						def        __lowercase     (	self :   List[str]					,     lowerCAmelCase__ :   List[int]					,     lowerCAmelCase__ :   Optional[List[int]] = None					,     lowerCAmelCase__ :   bool = False					):

													"""simple docstring"""
													if already_has_special_tokens:
																				return super().get_special_tokens_mask(
																				    token_ids_a=lowerCAmelCase__					,     token_ids_a=lowerCAmelCase__					,     already_has_special_tokens=lowerCAmelCase__					)

													if token_ids_a is None:
																				return [1] + ([0] * len(lowerCAmelCase__					)) + [1]
													return [1] + ([0] * len(lowerCAmelCase__					)) + [1, 1] + ([0] * len(lowerCAmelCase__					)) + [1]







						def        __lowercase     (	self :   Optional[int]					,     lowerCAmelCase__ :   List[int]					,     lowerCAmelCase__ :   Optional[List[int]] = None					):

													"""simple docstring"""
													SCREAMING_SNAKE_CASE       :   Optional[int]         =      [self.sep_token_id]
													SCREAMING_SNAKE_CASE       :   Optional[Any]         =      [self.cls_token_id]

													if token_ids_a is None:
																				return len(cls + token_ids_a + sep					) * [0]
													return len(cls + token_ids_a + sep + sep + token_ids_a + sep					) * [0]







						def        __lowercase     (	self :   List[str]					,     lowerCAmelCase__ :   Optional[Any]					,     lowerCAmelCase__ :   Optional[Any]=False					,     **lowerCAmelCase__ :   List[Any]					):

													"""simple docstring"""
													SCREAMING_SNAKE_CASE       :   str         =      kwargs.pop('''add_prefix_space'''					,     self.add_prefix_space					)
													if (is_split_into_words or add_prefix_space) and (len(lowerCAmelCase__					) > 0 and not text[0].isspace()):
																				SCREAMING_SNAKE_CASE       :   Tuple         =      ''' ''' + text
													return (text, kwargs)









'''simple docstring'''



from collections import defaultdict
def        UpperCAmelCase (    A	:					int					):
							SCREAMING_SNAKE_CASE       :   List[Any]         =      1
							SCREAMING_SNAKE_CASE       :   Dict         =      True
							for v in tree[start]:
														if v not in visited:
																					ret += dfs(A					)
							if ret % 2 == 0:
														cuts.append(A					)
							return ret
def        UpperCAmelCase (    ):
							dfs(1					)


if __name__ == "__main__":
							lowerCAmelCase_      ,				lowerCAmelCase_  :							Dict             =    10, 9
							lowerCAmelCase_  :							Dict             =    defaultdict(list)
							lowerCAmelCase_  :							dict[int, bool]             =    {}
							lowerCAmelCase_  :							list[int]             =    []
							lowerCAmelCase_  :							Optional[Any]             =    0
							lowerCAmelCase_  :							Dict             =    [(2, 1), (3, 1), (4, 3), (5, 2), (6, 1), (7, 2), (8, 6), (9, 8), (10, 8)]
							for u, v in edges:
														tree[u].append(v)
														tree[v].append(u)
							even_tree()
							print(len(cuts) - 1)




